If a woman gets rubella while she is pregnant, she could have a miscarriage or her baby could be born with serious birth defects.

These diseases spread from person to person through the air. You can easily catch them by being around someone who is already infected.

Measles, mumps, and rubella (MMR) vaccine can protect children (and adults) from all three of these diseases.

Thanks to successful vaccination programs these diseases are much less common in the U.S. than they used to be. But if we stopped vaccinating they would return.

Who should get MMR vaccine and when?

Childrenshould get 2 doses of MMR vaccine:

First Dose: 12 to 15 months of age

Second Dose: 4 to 6 years of age (may be given earlier, if at least 28 days after the 1st dose)

Some infants younger than 12 months should get a dose of MMR if they are traveling out of the country. (This dose will not count toward their routine series.)

Some adultsshould also get MMR vaccine: Generally, anyone 18 years of age or older who was born after 1956 should get at least one dose of MMR vaccine, unless they can show that they have either been vaccinated or had all three diseases.

MMR vaccine may be given at the same time as other vaccines.

Children between 1 and 12 years of age can get a combination vaccine called MMRV, which contains both MMR and varicella (chickenpox) vaccines. There is a separate Vaccine Information Statement for MMRV.

Who should not get MMR vaccine or should wait?

Anyone who has ever had a life-threatening allergic reaction to the antibiotic neomycin, or any other component of MMR vaccine, should not get the vaccine. Tell your doctor if you have any severe allergies.

Anyone who had a life-threatening allergic reaction to a previous dose of MMR or MMRV vaccine should not get another dose.

Some people who are sick at the time the shot is scheduled may be advised to wait until they recover before getting MMR vaccine.

Pregnant women should not get MMR vaccine. Pregnant women who need the vaccine should wait until after giving birth. Women should avoid getting pregnant for 4 weeks after vaccination with MMR vaccine.

Tell your doctor if the person getting the vaccine:

Has HIV/AIDS, or another disease that affects the immune system

Is being treated with drugs that affect the immune system, such as steroids

Has any kind of cancer

Is being treated for cancer with radiation or drugs

Has ever had a low platelet count (a blood disorder)

Has gotten another vaccine within the past 4 weeks

Has recently had a transfusion or received other blood products

Any of these might be a reason to not get the vaccine, or delay vaccination until later.

What are the risks from MMR vaccine?

A vaccine, like any medicine, is capable of causing serious problems, such as severe allergic reactions.

The risk of MMR vaccine causing serious harm, or death, is extremely small.

Getting MMR vaccine is much safer than getting measles, mumps or rubella.

Most people who get MMR vaccine do not have any serious problems with it.

Mild problems:

Fever (up to 1 person out of 6)

Mild rash (about 1 person out of 20)

Swelling of glands in the cheeks or neck (about 1 person out of 75)

If these problems occur, it is usually within 6 to 14 days after the shot. They occur less often after the second dose.

Moderate Problems:

Seizure (jerking or staring) caused by fever (about 1 out of 3,000 doses)

Temporary pain and stiffness in the joints, mostly in teenage or adult women (up to 1 out of 4)

Temporary low platelet count, which can cause a bleeding disorder (about 1 out of 30,000 doses)

Severe Problems (Very Rare):

Serious allergic reaction (less than 1 out of a million doses)

Several other severe problems have been reported after a child gets MMR vaccine, including: Deafness; long-term seizures, coma, or lowered consciousness; permanent brain damage. These are so rare that it is hard to tell whether they are caused by the vaccine.

What if there is a serious reaction?

What should I look for?

Any unusual condition, such as a high fever or unusual behavior. Signs of a serious allergic reaction can include difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, a fast heart beat or dizziness.

What should I do?

Calla doctor, or get the person to a doctor right away.

Tellyour doctor what happened, the date and time it happened, and when the vaccination was given.

Askyour doctor to report the reaction by filing a Vaccine Adverse Event Reporting System (VAERS) form. Or you can file this report through the VAERS web site at www.vaers.hhs.gov, or by calling 1-800-822-7967.

VAERS does not provide medical advice.

The National Vaccine Injury Compensation Program

The National Vaccine Injury Compensation Program (VICP) was created in 1986.

Persons who believe they may have been injured by a vaccine can learn about the program and about filing a claim by calling 1-800-338-2382 or visiting the VICP website at www.hrsa.gov/vaccinecompensation.

How can I learn more?

Ask your doctor.

Call your local or state health department.

Contact the Centers for Disease Control and Prevention (CDC): Call 1-800-232-4636 (1-800-CDC-INFO) or visit CDC's website at www.cdc.gov/vaccines.

MMR Vaccine Information Statement. U.S. Department of Health and Human Services/Centers for Disease Control and Prevention National Immunization Program. 4/20/2012.

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